package com.atguigu.gulimall.member.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Configuration
public class GuliFeignConfig {
    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor(){
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate requestTemplate) {
                //应用环境上下文
                //1、RequestContextHolder 拿到刚进来的这个请求
                //相当于拿到/toTrade  的 HttpServletRequest
                ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                   if(requestAttributes != null){


                    HttpServletRequest request = requestAttributes.getRequest();
    //                System.out.println("feign远程调用之前先进行RequestInterceptor.apply方法");
                    //同步请求头数据,Cookie
                        if(request != null){
                           String cookie = request.getHeader("Cookie");
                           //给新的请求同步了老请求的cookie
                           requestTemplate.header("Cookie",cookie);
                       }
                   }
            }
        };
    }

}
